Semalt: How To Use jQuery.Ajax In A Google Chrome Extension
Nowadays, web scrapers use high-ranked web scraping tools to extract useful data from web pages in usable formats. These web scraping tools comprise of pre-packed features that let you create an effective plan (sitemap) on how a website should be navigated and scraped.
Web data extraction is termed as the ultimate solution to pulling out information from the web automatically. If you are working on extracting information from dynamic sites, the first thing you have to do is to check whether the site comprises of an official Application Programming Interface (API) or not.
Typically, any data that can be viewed on e-commerce websites and web pages can be extracted automatically. In the current online marketing industry, sites are of more importance as compared to APIs. This is where jQuery.ajax comes in. Website owners focus on improving boosted engagement with potential visitors than maintaining their data feeds.
Using jQuery.ajax in Chrome plugin
The jQuery is an Ajax Chrome extension, which is widely used in the marketing industry to send web scraping requests. Applications like Google Maps, Facebook, and Gmail uses whole executing their tasks. Here are the common parameters that specify the values used in an Ajax request:
- Async – This Ajax Chrome extension value indicates whether the total number of requests sent should be executed asynchronously or not;
- Cache – Cache value indicates whether Google Chrome should cache the requested web pages. Note that "Before Send" function is run before a request is sent to the target web pages;
- Context – This Ajax Chrome extension specifies the primary value of all the Ajax-based callback functions;
- ProcessData – When it comes to using AJAX, this value specifies whether sent data with requests should be fully transformed into a query string or not. Note that the required URL parameter specifies the URL you prefer to load.
What you need to know about jQuery and AJAX
Extracting data from websites developed using heuristic technology can be a bit tricky. With proper jQuery AJAX techniques, you can quickly request JSON, XML, or HTML from a remotely located server using both HTTP Post and HTTP Get. Note that jQuery offers a vast number of AJAX functionality.
Different browsers contain different syntax for each AJAX implementation. You, therefore, have to write multiple codes for different browsers such as Mozilla, Google Chrome, and Internet Explorer. Luckily, you can load external data directly into the previously selected HTML elements of the target web page.
In most cases, jQuery uses "GET" and "POST" methods to request data from specified resources and submitting information to be processed to specified resources. By default, all the requests are sent asynchronously (True). To use the simultaneous applications, set the asynchronous option as false. Use jQuery.Ajax Chrome extension to ease your web scraping campaign and obtain both accurate and structured data.